Use VMA05 on Arduino DUE?

Hi community.
The VMA05 user manual states “For use with Arduino Due”. The Due’s input pins are 3,3V and are not 5V tolerant. But on the VMA05 schematic I see that the digital inputs get their high voltage from the 5V through a LED and a 470R resistor. I guess the LED cause a voltage drop to 3.5V and together with the 470R that might be safe to work. Am i right?